Agricultural implement



Sept. 22, 1925.

J. JENSEN AGRICULTURAL IMPLEMENT Filed Marbh 12, 1925 2 Sheets-Sheet 1 L V enfdr:

i/forn z Sept. 22, 1925. 1,554,282

.J. JENSEN AGRICULTURAL IMPLEMENT Filed March 12, 1925 lShaets-Shoot 2 Patented Sept. 22, 1925.

UNITED STATES 1,554,282 PATENT OFFICE.

JENS JENSEN, OF BRODTEN, NEAR TRAVEMUNDE,

GERMANY, Assrenoa r GEORG HARDER MASCHINENFABRIK AKTIENGESELLSCHAIFT, OF LUBECK, GERMANY.

AGRICULTURAL IMPLEMENT.

Application filed March 12, 1925. Serial No. 15,116.

ground leveller.

Devices of this kind are known inwhich two or more supporting or levelling runners are arranged on a common frame one behind the other and in which the working rail or scraper can be swung and adjusted vertically in relation to the ground. Swinging of the working rail serves the purpose of adapting the device in each instance to the surface of the ground or the purpose of working respectively; that is, to say, the operative rail can be adjusted so as to effect a cutting, levelling or scraping action according to local requirements. Changing the horizontal position however effects the proper adjustment as to depth of the working edge of the rail, which depth for instance might have to be greater for a cutting action than for a scraping action.

The object of the invention is to provide an arrangement, which will allow of a simple, quick and safe adjustment of the working rail or scraper for all kinds of ground and irregularities of the surface of the ground to be worked on,even during the working operation. For that purpose the working rail is swung out by means of a positively guided adjusting device in such a manner that its working edge describes a curve, whose centre of curvation travels vertically.

The working rail or scraper can be mounted on one wing of angle bars, whose other wing may be adapted to receive a guiding bolt on the frame of the levelling device'and also to serve as a means for connecting the traction device.

In the drawing two forms of the invention are illustrated in which Figure 1 shows a side elevation and Figure 2 a partial top view of one form.

Figure 3 is a view in side elevation of the second form.

Figure 4: is a plan of Figure 3.

cultural implement and in particular to a Figures 5 and 6 show different adjustments of the working rail or runner.

The frame of the levelling device con.

sists of two rails 0 and 39 disposed at right angles to the direction of pull, which rails are rigidly connected to one another bya plurality of transverse bolts 1' provided with distance sleeves 9. These parts form the.

frame a. Rigidly connected with the said frame are pairs of rearwardly-inclined sup porting arms 6, to the lower ends of which arms supportlng or levelling ralls s are connected for instance in the form of rollers. 4

vertical hinge members all are arranged, in whose longitudlnal slots t are slidable the pins 9 attached to the complemental hinge -At the front end of the frame a number of members 6, the latter members carrying the it working rail oinscraper f. 2' indicates one 3 or more rods linked to the lower hinge members 6 and guided longitudinally in or on the carrying arms or supports Z) or other elements of the levelling device. A doublearmed lever Z pivotally mounted at u engages the. rod or rods i, which lever is adjustahly engaged with a toothed sector 7? attached to the frame, by means of a spring-' loaded detent m. 1; indicates one or more pulling hooks for connection to the levelling device.

In the example shown the guiding rod i travels endwise in a horizontal plane, but it may likewise be guided in an inclined direction as shown in Figure 1 by a broken line. If it is desired to bring the working rail or scraper f into another angular position relative to the ground, the lever Z, after releasing the detent m, is moved in a forward or backward direction, by which a longitudinal displacement of the rod or rods 2" is effected. By this operation the scraper rail will not only be swung about the pin 9' as a center but this latter is positively shifted in the longitudinal slots t into another horizontal position at the same time. Consequently the lower edge of the scraper rail will describe a curve, whose centre of curvature travels vertically.

If the guiding points in the carrying arms or supports 6 for the rods 6 are shifted in such a'manner that the rods z are in a position angular to the plane of the ground, the scraper rail f following this change in position will now swing with its lower edge angularly to the plane of the ground (see the dotted line in Figure 1). By this method it is possible to force the lower edge of the scraper rail deeper into the ground while swinging forward.

The rodsi may also be provided with corrugated or cranked lower or upper edges respectively, by which means a corresponding positive wavelike movement of therunner is obtained. The .slot and pinguidance may be substituted by any other convenient guidance of similar 7 effect.

In the constructionaccording to Figures 3to ,6 supports Z) are arranged on the frame a forthe supporting or levelling rails 0 as wellasfor the guides (Z for the angle bars 6 upon which is mounted the working or scraper:rail 7". The latter is mounted on one of the wings of the'ang'le bar a while the other-wing is provided with an'aperture for the guiding bolt and with openings 7t for COIIDQCtHIg the tract-ion device.

There are arranged a. number of openings h in juxtaposition in-order to allow of the traction device being connected at a higher or lower point according to requirements for which can he clamped in position by means of a detent m having an adjusting; stirrup 72. Through the adjusting lever Z the scraper rail can be swung out into different positions, as shown in Figures 3, 5 and 6.

I claim:

1. In combination with a ground leveller, two supporting or levelling rails, a front working rail or Scrapper, and a positively guided adjusting device for swinging said scraper in such a manner that its working edge describes a curve whose centre of can Nature will travel vertically.

2. In combination with aground leveller,

two supportingor levelling rails, a front working rail or scraper, apositivelyguided adjusting device for swinging said scraper in such. a manner that its working edge de scribes a curve whose centre of curvature 'will travel vertically, and angle bars on one wing whereof'saidscraper is mounted, the other wing of said bars adapted to have connected-theretoa guidingbolt and a pullins; device.

3. In combination with a ground leveller, two supporting or levelling rails, a front workingrail or scraper, and a positively guided adjusting device for swinging: said scraper in. such a manner that its working edge describes a curve whose centre of curvature will travel vertically; said adjusting;

device comprising; a control rod guided in the frame of the levelling device, and an adjusting lever for displacing said rod.

In testimony whereof I have atliz-zcd my signature.

JENS JENSEN. 

